It did not live up to the expectations the community had for it, nor the ones created by previous games.
FNaF 3 was just not as engaging. The main jumpscare was weak and more so comical than scary, the mechanics were all over the place and honestly confusing, the game was 'easy' but not in a traditional way and it just was not that fun.

Of course a lot of new things were added to the table like jumpscares that did not end your night, which was genuinely a good mechanic that made you panic, but very little more of value was added